[Karellen]

It's probably worth trying LibreOffice again if your last install was a couple of years ago. They take document compatibility bugs pretty seriously and fix a bunch with every release.

That's probably the easiest step to take next, before looking at virtualization or a full Linux install with Wine.

[kbelder]

LibreOffice does everything I need personally, and is far more powerful and useful than Google's or Microsoft's web suite.

I still use desktop Office for spreadsheets that need to be shared. Word docs are pretty well supported by Libre at this point.

[baq]

Calc is... bad. It's slow and I've run into bugs in formulas; would rather use google sheets, which are a different kind of bad, but better than calc. No issues with writer, haven't used anything else.

[Paianni]

You would probably like Gnumeric, though that project is very Unix-specific.